Freshers India

A motorboat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. The speed of the stream (in km/hr) is:?                          

A man can row a boat at 10 kmph in still water. If the speed of the stream is 6 kmph, the time taken to row a distance of 80 km down thestream is :?                          

In one hour, a boat goes 11 km along the steram and 5 km against the stream. The speed of the boat in still waer (in km/hr) is:?                          

A man can row upstream at 7 kmph and downstream at 10 kmph.Find man's rate in still water and the rate of current??                          

A man rows downstream 32 km and 14 km upstream. If he takes 6 hours to cover each distance, then the velocity (in kmph) of the current is:?                          

A boatman can row 48 km downstream in 4 hr. If the speed of the current is 5 km/hr, then find in what time will be able to cover 8 km upstream??